Trolley.



PATENTED AUG. '7, 1906.

G. C. THOMAS.

TROLLEY.

APPLIoATIoN FILED AUG. 26. 1905.

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25 the. nuts'll.

3 5 preferably has a straight 5o around curves.

- `UNITED STATES PATENT OEEIOE.v

' GEORGE o. THOMAS, or NEW YORK, nr.

' TROLLEY. r

Specification of 'Letters Patent.

Patented Aug. '7, 19 06.

Application filed August 26, 1905. Serial No. 275,907.

T a/ZZ whom it may czmcern:`

Be it known that I, GEORGE C. THOMAS, a citizen of the United States, and a resident of New York city, in the county of Kings and State of New York, have invented certain new and useful Improvements in Trolleys, of which the following is a specification, taken in connection with the accompanying drawin s, which form part of the same.

gIhis invention relates to trolleys, and relates to such trolleys as are adapted for use in connection with an elevated track of llbeam form, for instance.

ln the accompanying drawings,lshowing r 5 an illustrative embodiment of this invention,

Figure 1 is an end view, partly in section; and

, Fig. 2 is a side view, parts being Shown in section along the line 2 2 of Fig. 1.

in the illustrative form shown in the dawzo ingsa rigid frame is formed by rigidly securing the two casings 4 together by the bearingrod 12, which, as indicated, may have its eX- tensions bolted securely in bearing-lugs 9 on the depending portions 1 of the casings by A tubular spacer 17 may also be secured in position between these two casin s by the bolt 16 and nuts 18, so as to form a race. Each casing i isv preferably provided with an angularly-disposed ball-race 2,

3o the plane of this race being so arranged as to be substantially per endicular to thecontactface ofthe track which the trolley coperates, a suitable track 8 of li-beam form being indicated in the drawings. The ball-race ower portion, so that the bearing-balls 3 coperate throughout a considerable distance with the track, and this lower part of the race also preferably has a suitable facing 6 secured thereto, this facing 4o being of hardened steel or other suitable bearing material to minimize friction and wear. A suitable ca 5 is secured in position on the casing 4 by olts 7 or other desired fastening means, so that the balls or other antifrictional members used are loosely re-l tained in position within the casing. Suitable laterally-arranged guide-rolls may be used in each frame, if desired, so as to prevent cramping when the trolley passes sindicated, the antifrictional rolls 20 are pivoted by the pins 21 in suitable cavities in the casings, so as to coperate with the track. The rigid trolleyframe thus formed engages the track and either end to loosely engage sai one or more of vthese frames, as desired, may be used as a single trolley.

It is desirable in most cases to use a plurality of trolley-frames or supportin members engaging the track and to loos nect these members with ayoke, which allows a .slight swiveling movement between the 4parts and which carries the load of merchan-4 dise or the like which the trolley is used to transport.

connected by a yoke 13, provided at either end -with openings 19 to accommodate the' bearing-bars and arranged to allow a considerable swiveling movement between these. 7o

two parts, so as to allow the trolley to operate freely around curves and to accommodate itself to such irregularities in the track as may be found in practice. The hanger 14,

in the form of a closed ring or otherwise, may 7 5 be loosely pivoted to the yoke by a shacklebolt 15 or in any other desired way.

Having described this invention in connection with an illustrative embodiment of the same, to the details'of which l do not desire 8o*l to be limited, what l claim as new, and what l desire to secure by Letters Patent, is set forth in the appended claims.

1. ln trolleys, rigid frames com rising casings each casing having an inwar ly-proj ect- 8 5 stantially axially located bearing surface, 9o

each casing having an angularly-dis osed ball-race with a substantially straight ower portion, a facing for said lower portion, balls in said race an a yoke having openings at bars. 2. 1n trolleys, rigid frames comprising two casings having inwardly-projectin lugs, a bearing-bar rigidly secured in sai lugs, a brace an angularly-dis osed ll-race having a sub- Y stantially straig `t lower ortion, a 'facing-for said lower portion oi said race, balls in said race, a cap removably secured on said casing to .hold said balls loosely in position, a yoke- .zo 5

having openings loosely engaging each of said bearin -bars to swivelingly connectsaid frames an a hanger loosely connected to said yoke.

y con- 6o Preferably two similar frames 65 are used together, and the frames may be bearing- 9 5 etween said luis, each casing having roo A moves along it with very slight friction, and

3. in trolleys,- two rigid frames provided ne Y with a plurality of'casings, each easing hav--v ing', an anularly-disposedvball-race Vwith a su stantia straight lower fportion, a tbearin-bar rigi ycOnnecting said casings and a yo swivelingly connect said frames.

4. In trolleys, two-rigid rames,each frame comprising a plurality of casings, each casing havin a ball-race with -a substantially straig t lower portion,v balls in said race to -coperate with fa track 'and'fa yoke loosely connecting said rames. I

5. Y In trolleys, two Jframes comprising-casngsLeachcasing being formed With`a ballrace -havin a substantially straight lower portion, ba s in said race ltojcorpveratewith a trackr and a `yoke 'to loosely connect said framesff Q A Y '6; Introlleys, two rigidfrarnes,'eacl1frame `comprising-a plurality 'o 'casin with llate rally--arranged guide-Ta, Peach casling having Aa ball-race with a substantially straight` lower `portion, halls 'in said -race to Vcoperate with a 'track `and fa yo'ke i looseily 25 E'connecting said-frames. v 7. In'tro'lleysl'ri'gid framescomprisingftwo e loosely engaging said bearing-bars tol fpl'o'vided lugs, a-

casings l ugs, a

v for said. lower portion of sa1d race, Balls 1n said race, a cap removably secured on `said casing to. hold said balls loosely lin position, antifric'tional guide-rolls 'arranged in said 35 frames, a yoke having openings loosely en# gaing each o'f vsaid b earmg-ba'rs ito swivel- -mgy Aconnect said flames and :a lhangerl loose] 'connected to said yoke. 4 A8. prising casings, 'each ca am'ng an'm; wardly-projecting-lug'onmapenlin lower portion, a 'bar rigidly secured -m said to connect said -casings ,and orminga -sdbstdntiall'y Aaxially-located -snspendin mem'ber, 45 each casing having fan angdl ydisposed ace with asubstantially straighti ower Epertion, Aand'antifrictional vmembersfin said vra'ce. v GEORGE C.

Witnesses:

Hamer JAMES VN. 'Carr-.ow

r trolleys, `a 'rigid trolls framepbcm- 4o- 

